/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.dolphinscheduler.api.dto.resources.filter;

import org.apache.dolphinscheduler.dao.entity.Resource;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

/**
 * resource filter
 */
public class ResourceFilter implements IFilter {
  /**
   * resource suffix
   */
  private String suffix;
  /**
   * resource list
   */
  private List<Resource> resourceList;

  /**
   * parent list
   */
  //Set<Resource> parentList =  new HashSet<>();

  /**
   * constructor
   *
   * @param suffix       resource suffix
   * @param resourceList resource list
   */
  public ResourceFilter(String suffix, List<Resource> resourceList) {
    this.suffix = suffix;
    this.resourceList = resourceList;
  }

  /**
   * file filter
   *
   * @return file filtered by suffix
   */
  public Set<Resource> fileFilter() {
    return resourceList.stream().filter(t -> {
      String alias = t.getAlias();
      return alias.endsWith(suffix);
    }).collect(Collectors.toSet());
  }

  /**
   * list all parent dir
   *
   * @return parent resource dir set
   */
  Set<Resource> listAllParent() {
    Set<Resource> parentList = new HashSet<>();
    Set<Resource> filterFileList = fileFilter();
    for (Resource file : filterFileList) {
      parentList.add(file);
      setAllParent(file, parentList);
    }
    return parentList;

  }

  /**
   * list all parent dir
   *
   * @param resource resource
   * @return parent resource dir set
   */
  private void setAllParent(Resource resource, Set<Resource> parentList) {
    for (Resource resourceTemp : resourceList) {
      if (resourceTemp.getId() == resource.getPid()) {
        parentList.add(resourceTemp);
        setAllParent(resourceTemp, parentList);
      }
    }
  }

  @Override
  public List<Resource> filter() {
    return new ArrayList<>(listAllParent());
  }
}
